Fix devcontainer build failure due to env var being interpreted as non-string (brianc#2844)

Author: nihonjinrxs

.devcontainer/docker-compose.yml

@@ -27,7 +27,7 @@ services:
       PGHOST: db
       # set this to true in the development environment until I can get SSL setup on the 
       # docker postgres instance
-      PGTESTNOSSL: true
+      PGTESTNOSSL: 'true'
 
     # Overrides default command so things don't shut down after the process ends.
     command: sleep infinity