Add Linode as an installation option in docs

[techknowlogick]

as title

[codecov-commenter]

Codecov Report

Merging #16529 (f4455f2) into main (5d2e11e) will decrease coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #16529      +/-   ##
==========================================
- Coverage   45.42%   45.34%   -0.09%     
==========================================
  Files         747      747              
  Lines       84465    84465              
==========================================
- Hits        38368    38299      -69     
- Misses      39930    39990      +60     
- Partials     6167     6176       +9     

Impacted Files	Coverage Δ
cmd/serv.go	2.51% <ø> (ø)
modules/generate/generate.go	0.00% <ø> (ø)
routers/web/user/oauth.go	36.53% <ø> (ø)
services/auth/source/oauth2/jwtsigningkey.go	32.50% <ø> (ø)
services/auth/source/oauth2/token.go	72.72% <ø> (ø)
services/lfs/server.go	70.43% <ø> (ø)
modules/references/references.go	60.86% <0.00%> (-24.12%)	⬇️
services/pull/check.go	26.20% <0.00%> (-2.07%)	⬇️
modules/charset/charset.go	71.71% <0.00%> (-2.03%)	⬇️
modules/notification/ui/ui.go	60.86% <0.00%> (-1.45%)	⬇️
... and 9 more

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