[misc] bring back old schema of revision.txt

- store in /var/www/revision.txt
- prefix each line with the services directory

server-ce/Dockerfile

@@ -18,7 +18,7 @@ RUN node genScript checkout | bash \
   \
 # Store the revision for each service
 # ---------------------------------------------
-&&  node genScript revisions | bash > revisions.txt \
+&&  node genScript revisions | bash > /var/www/revisions.txt \
   \
 # Cleanup the git history
 # -------------------

server-ce/genScript.js

@@ -12,6 +12,7 @@ switch (process.argv.pop()) {
     break
   case 'revisions':
     for (const service of services) {
+      console.log(`echo -n /var/www/sharelatex/${service.name},`)
       console.log(`git -C ${service.name} rev-parse HEAD`)
     }
     break