Build webapp script fix (#111)

* build-webapp-script-fix

* build-webapp-script-fix

.gitignore

@@ -2,5 +2,6 @@ node_modules/
 yarn-error.log
 .yarnrc.yml
 .yarn/
+.yarnrc
 
 packages/backend/environments/local.toml

build-webapp.sh

@@ -9,6 +9,14 @@ if [[ -d "$DEST_DIR" ]]; then
   exit 1
 fi
 
+if [[ -f "$PKG_DIR/.env" ]]; then
+  echo "Using existing .env file"
+else
+  mv "$PKG_DIR/.env.example" "$PKG_DIR/.env"
+  echo "Created .env file. Please populate with the correct values."
+  exit 1
+fi
+
 cat > $PKG_DIR/.env <<EOF
 REACT_APP_SERVER_URL = 'LACONIC_HOSTED_CONFIG_app_server_url'
 REACT_APP_GITHUB_CLIENT_ID = 'LACONIC_HOSTED_CONFIG_app_github_clientid'