Reduce the number of instances of a PG cluster (#17)

Since Fly has difficulties provisioning cluster for the moment, we will
reduce it for the time being.

README.md

@@ -58,7 +58,7 @@ jobs:
 
       - name: Deploy
         id: deploy
-        uses: fewlinesco/fly-io-review-apps@v3.5
+        uses: fewlinesco/fly-io-review-apps@v3.6
 ```
 
 ## Cleaning up GitHub environments
@@ -86,7 +86,7 @@ jobs:
 
       - name: Deploy app
         id: deploy
-        uses: fewlinesco/fly-io-review-apps@v3.5
+        uses: fewlinesco/fly-io-review-apps@v3.6
 
       - name: Clean up GitHub environment
         uses: strumwolf/delete-deployment-environment@v2
@@ -111,7 +111,7 @@ steps:
 
   - name: Deploy app
     id: deploy
-    uses: fewlinesco/fly-io-review-apps@v3.5
+    uses: fewlinesco/fly-io-review-apps@v3.6
     with:
       postgres: true
 ```
@@ -125,7 +125,7 @@ steps:
 
   - name: Deploy app
     id: deploy
-    uses: fewlinesco/fly-io-review-apps@v3.5
+    uses: fewlinesco/fly-io-review-apps@v3.6
     with:
       postgres: true
       region: cdg
@@ -146,7 +146,7 @@ steps:
   - uses: actions/checkout@v3
 
   - name: Deploy redis
-    uses: fewlinesco/fly-io-review-apps@v3.5
+    uses: fewlinesco/fly-io-review-apps@v3.6
     with:
       update: false # Don't need to re-deploy redis when the PR is updated
       path: redis # Keep fly.toml in a subdirectory to avoid confusing flyctl
@@ -155,7 +155,7 @@ steps:
 
   - name: Deploy app
     id: deploy
-    uses: fewlinesco/ffly-io-review-apps@v3.5
+    uses: fewlinesco/ffly-io-review-apps@v3.6
     with:
       name: pr-${{ github.event.number }}-myapp-app
 ```

entrypoint.sh

@@ -48,7 +48,7 @@ if ! flyctl status --app "$app"; then
   # if PostgreSQL is requested, create a PostgreSQL App then Deploy Application
   if [ -n "$INPUT_POSTGRES" ]; then
     if ! flyctl status --app "$postgres_app"; then
-      flyctl postgres create --name "$postgres_app" --region "$region" --org "$org" --vm-size "$postgres_vm_size" --volume-size 1 --initial-cluster-size 2
+      flyctl postgres create --name "$postgres_app" --region "$region" --org "$org" --vm-size "$postgres_vm_size" --volume-size 1 --initial-cluster-size 1
       # Create additional PostgreSQL read replicas
       if [ -n "$INPUT_POSTGRES_CLUSTER_REGIONS" ]; then
         pg_machine_id=$(flyctl machine list -a $postgres_app --json | jq --raw-output  '.[0].id')