Merge pull request #15926 from overleaf/jpa-saml-meta-public

[web] make /saml/meta endpoint public again

GitOrigin-RevId: 37acd01cb74abe370d8ae5cf1688e291f3d9a0bd

server-ce/hotfix/4.2.1/Dockerfile

@@ -0,0 +1 @@
+FROM sharelatex/sharelatex:4.2.0