There is a basic one in the lilypond documentaion :- https://lilypond.org/doc/v2.18/Documentation/snippets/templates if you scroll down the page.

these posts are getting flagged for moderation, sorry

hymn_melody_layout.ly

\version "2.18.2"

\layout {
%#(layout-set-staff-size 16)
indent = 0.0\cm
ragged-right = ##f
ragged-last = ##f
\context {
\Score
% **** Turns off bar numbering
\remove "Bar_number_engraver"

}
\context {
\Staff
\remove "Time_signature_engraver"
}
}

hymn_definitions.ly

\version "2.18.2"


%setting the global staff size in a top level variable is the only way to adjust the global size
%#(set-global-staff-size 16)

%%%%%%
%%%%%%
%%%%%%
%verse numbers on each line
vOne = {
\set stanza = "1."
\set shortVocalName = "1."
\override InstrumentName #'X-offset = #3
\override InstrumentName #'font-series = #'bold
\override InstrumentName #'font-size = #'0.1
}

vTwo = {
\set stanza = "2."
\set shortVocalName = "2."
\override InstrumentName #'X-offset = #3
\override InstrumentName #'font-series = #'bold
\override InstrumentName #'font-size = #'0.1
}

vThree = {
\set stanza = "3."
\set shortVocalName = "3."
\override InstrumentName #'X-offset = #3
\override InstrumentName #'font-series = #'bold
\override InstrumentName #'font-size = #'0.1
}

vFour = {
\set stanza = "4."
\set shortVocalName = "4."
\override InstrumentName #'X-offset = #3
\override InstrumentName #'font-series = #'bold
\override InstrumentName #'font-size = #'0.1
}

vFive = {
\set stanza = "5."
\set shortVocalName = "5."
\override InstrumentName #'X-offset = #3
\override InstrumentName #'font-series = #'bold
\override InstrumentName #'font-size = #'0.1
}

vSix = {
\set stanza = "6."
\set shortVocalName = "6."
\override InstrumentName #'X-offset = #3
\override InstrumentName #'font-series = #'bold
\override InstrumentName #'font-size = #'0.1
}

vSeven = {
\set stanza = "7."
\set shortVocalName = "7."
\override InstrumentName #'X-offset = #3
\override InstrumentName #'font-series = #'bold
\override InstrumentName #'font-size = #'0.1
}

%half bar
hb = {
%% This creates a half bar that reaches
\once \override ChoirStaff.BarLine.bar-extent = #'( -1 . 1 )
\bar "|"
}

qb = {
%% Set height of bar line to 2 staff-spaces
\once \override ChoirStaff.BarLine.bar-extent = #'( 1.5 . 2.5 )
\bar "|"
}

divisioMinima = {
\once \override BreathingSign.stencil = #ly:breathing-sign::divisio-minima
\once \override BreathingSign.Y-offset = #2
\breathe
}
divisioMaior = {
\once \override BreathingSign.stencil = #ly:breathing-sign::divisio-maior
\once \override BreathingSign.Y-offset = #0
\breathe
}
divisioMaxima = {
\once \override BreathingSign.stencil = #ly:breathing-sign::divisio-maxima
\once \override BreathingSign.Y-offset = #0
\breathe
}
finalis = {
\once \override BreathingSign.stencil = #ly:breathing-sign::finalis
\once \override BreathingSign.Y-offset = #0
\breathe
}

%%%%%%%%%%%%

hn =
#(define-music-function
(parser location note)
(ly:music?)
#{
\once \override Voice.NoteHead #'stencil =
#ly:text-interface::print
\once \override Voice.NoteHead #'text =
\markup \musicglyph #"noteheads.s1"
%\once \override Voice.Stem #'stencil = ##f
$note
#})

%%%%%%%%%%%%

i = {
\override Lyrics.LyricText #'font-shape = #'italic
}

bo = {
\override Lyrics.LyricText #'font-series = #'bold
}

plainText = {
\revert Lyrics.LyricText #'font-shape
\revert Lyrics.LyricText #'font-series
}


%%%%%%%%%%%%

orAcc = \override Voice.Accidental.stencil = ##f

revAcc = \revert Voice.Accidental.stencil

%%%%%%%%%%%%%%%

ignore = \override NoteColumn #'ignore-collision = ##t

%%%%%%%%%%%%%

lal = \once \override LyricText.self-alignment-X = #LEFT

%%%%%%%%%%%%%%%

tagIt = \once \override Lyrics.LyricText #'tagged = ##t

#(define (define-grob-property symbol type? description)
(if (not (equal? (object-property symbol 'backend-doc) #f))
(ly:error (_ "symbol ~S redefined") symbol))

(set-object-property! symbol 'backend-type? type?)
(set-object-property! symbol 'backend-doc description)
symbol)

#(map
(lambda (x)
(apply define-grob-property x))

`(
(tagged ,boolean? "is this grob marked?")
(syllables ,array? "the lyric syllables at a timestep")
))


#(define (Lyric_text_align_engraver ctx)
"If the property 'tagged is set, collect all lyric syllables at that
timestep in the grob-array 'syllables"
(let (; We will collect LyricText items here.
(syl '()))
(make-engraver
(acknowledgers
((lyric-syllable-interface trans grob source)
(set! syl (cons grob syl))))
((stop-translation-timestep trans)
; This ensures that callbacks will have access to all of the LyricText grobs
; in a column though any of the LyricText grobs in that column.
(if (any (lambda (x) (eq? #t (ly:grob-property x 'tagged)))
syl)
(for-each (lambda (x)
(for-each
(lambda (y)
(ly:pointer-group-interface::add-grob x 'syllables y))
syl))
syl))
; clear our cache of syllables in readiness for another group
(set! syl '())))))

#(define (X-offset-callback grob)
(let* (; This is the grob-array we created to hold targeted syllables.
(target (ly:grob-object grob 'syllables))
; Check is necessary because engraver has only created 'syllables
; grob-array in response to tag
(target
(if (ly:grob-array? target)
(ly:grob-array->list target)
'()))
; A procedure to determine the size of a text stencil:
(length (lambda (item)
(interval-length
(ly:stencil-extent
(grob-interpret-markup grob (ly:grob-property item 'text))
X)))))
(if (pair? target) ; Do we have a 'syllables grob-array?
(let ((longest
(fold
(lambda (elem prev)
(if (> (length elem) (length prev)) elem prev))
(car target)
target)))
(if (eq? grob longest)
; If our grob has the longest syllable, return its default
; value for 'X-offset.
(ly:self-alignment-interface::aligned-on-x-parent grob)
; Otherwise, give it the X-offset value of the longest syllable.
(ly:grob-property longest 'X-offset)))

; If no grob-array, return the default function for 'X-offset
(ly:self-alignment-interface::aligned-on-x-parent grob))))

My template is below. It will create a 4 part score and a cropped melody only score. I use frescobaldi, and render the melody scores as png files for use in Publisher for worship aids.
There are additional files referenced in this template which I will post as additional comments below.
You can see this all in practice at https://github.com/magdalenesacredmusic/English-Hymns

\version "2.18.2"
\include "english.ly"
\include "hymn_definitions.ly"

top = \markup {
\fill-line {
\column {
\line {}
}
\right-column{
\line {}
\line {}
}
}
}

bottom = \markup {
\fill-line {
\null
\right-column {
\line {}
\line {}
}
}
}

\header {
tagline = ""
}

global = {
\key g \major
\time 4/4
\autoBeamOff
\set Staff.midiInstrument = "church organ"
}

melody = \relative c'' {
\global


\bar "|."
}

alto = \relative c' {
\global

}

tenor = \relative c' {
\global

}

bass = \relative c {
\global

}

verseOne = \lyricmode {
\vOne

}

verseTwo = \lyricmode {
\vTwo

}

verseThree = \lyricmode {
\vThree

}

verseFour = \lyricmode {
\vFour

}

\book {
\include "hymn_paper.ly"
\header {
tagline = ""
}
\top
\score {
\new ChoirStaff <<<br /> \new Staff <<<br /> \new Voice = "soprano" { \voiceOne \melody }
\new Voice = "alto" { \voiceTwo \alto }
>>
\new Lyrics \lyricsto soprano \verseOne
\new Lyrics \lyricsto soprano \verseTwo
\new Lyrics \lyricsto soprano \verseThree
\new Lyrics \lyricsto soprano \verseFour
\new Staff <<<br /> \clef bass
\new Voice = "tenor" { \voiceOne \tenor }
\new Voice = "bass" { \voiceTwo \bass }
>>
>>
\midi {
\context {
\Score
tempoWholesPerMinute = #(ly:make-moment 96 4)
}
}
\include "hymn_layout.ly"
}
\bottom
}

%%%%%%
%%%%%%
%%%%%%
#(define output-suffix "Melody")
\book {
\include "lilypond-book-preamble.ly"
\include "hymn_melody_paper.ly"
\top
\score {
%\transpose c bf,
<<<br /> \new Voice = "tune" {
\melody
}
\new Lyrics \lyricsto "tune" { \verseOne }
\new Lyrics \lyricsto "tune" { \verseTwo }
\new Lyrics \lyricsto "tune" { \verseThree }
\new Lyrics \lyricsto "tune" { \verseFour}
>>
\include "hymn_layout.ly"
}
\markup {
\vspace #0.5
}
\bottom
}

hymn_melody_paper.ly


\version "2.18.2"

%%%%%%%%%%%

\paper {
indent=0\mm
line-width=4.5\in
oddFooterMarkup=##f
oddHeaderMarkup=##f
bookTitleMarkup = ##f
scoreTitleMarkup = ##f

}

%%%%%%%%%%%

#(set-global-staff-size 16)

%%%%%%%%%%%