Make parallel deployments easier

* Rename stuff to be clearer that the "slug" isn't random
* Include the slug in the app name to facilitate parallel deployments
    in the same space.
* Default to 1 image, so you can fit two deployments in a 1G sandbox
    space

manifest.yml

@@ -4,23 +4,23 @@ defaults: &defaults
     - ((db-instance))
   disk_quota: 3G
   memory: 256M
-  instances: 2  
+  instances: 1  
 
 applications:
 
 ################################
-- name: spiffworkflow-frontend
+- name: spiffworkflow((slug))-frontend
   <<: *defaults
   routes:
-    - route: spiffworkflow-((randomish-route)).app.cloud.gov
+    - route: spiffworkflow((slug)).app.cloud.gov
   docker:
     image: ((frontend-image))
   env:
     APPLICATION_ROOT: "/"
     PORT0: "8080"
     SPIFFWORKFLOW_FRONTEND_RUNTIME_CONFIG_APP_ROUTING_STRATEGY: "path_based"
-    SPIFFWORKFLOW_FRONTEND_RUNTIME_CONFIG_BACKEND_BASE_URL: "https://spiffworkflow-((randomish-route)).app.cloud.gov/api"
-    BACKEND_BASE_URL: "https://spiffworkflow-((randomish-route)).app.cloud.gov/api"
+    SPIFFWORKFLOW_FRONTEND_RUNTIME_CONFIG_BACKEND_BASE_URL: "https://spiffworkflow((slug)).app.cloud.gov/api"
+    BACKEND_BASE_URL: "https://spiffworkflow((slug)).app.cloud.gov/api"
     # We may need to set BACKEND_URL; see spiffworkflow-frontend/src/config/tsx:15-72
 
     # WHERE WE STOPPED:
@@ -43,12 +43,12 @@ applications:
 
 #################################
 
-- name: spiffworkflow-backend
+- name: spiffworkflow((slug))-backend
   <<: *defaults
   disk_quota: 3G
   health_check_type: process
   routes:
-    - route: spiffworkflow-((randomish-route)).app.cloud.gov/api
+    - route: spiffworkflow((slug)).app.cloud.gov/api
 
   # With buildpack:
   # path: spiffworkflow-backend
@@ -91,10 +91,10 @@ applications:
     # vars.yml (or CLI)
     FLASK_SESSION_SECRET_KEY: ((flask-session-key))
     SPIFFWORKFLOW_BACKEND_OPEN_ID_CLIENT_SECRET_KEY: "((openid-secret))"
-    SPIFFWORKFLOW_BACKEND_OPEN_ID_SERVER_URL: "https://spiffworkflow-((randomish-route)).app.cloud.gov/api/openid"
-    SPIFFWORKFLOW_BACKEND_URL: "https://spiffworkflow-((randomish-route)).app.cloud.gov/api"
-    SPIFFWORKFLOW_BACKEND_URL_FOR_FRONTEND: "https://spiffworkflow-((randomish-route)).app.cloud.gov/api"
-    SPIFFWORKFLOW_BACKEND_CONNECTOR_PROXY_URL: "https://spiffworkflow-connector-((randomish-route)).app.cloud.gov"
+    SPIFFWORKFLOW_BACKEND_OPEN_ID_SERVER_URL: "https://spiffworkflow((slug)).app.cloud.gov/api/openid"
+    SPIFFWORKFLOW_BACKEND_URL: "https://spiffworkflow((slug)).app.cloud.gov/api"
+    SPIFFWORKFLOW_BACKEND_URL_FOR_FRONTEND: "https://spiffworkflow((slug)).app.cloud.gov/api"
+    SPIFFWORKFLOW_BACKEND_CONNECTOR_PROXY_URL: "https://spiffworkflow-connector((slug)).app.cloud.gov"
 
     #   - SPIFFWORKFLOW_BACKEND_DATABASE_URI=mysql+mysqldb://root:${SPIFFWORKFLOW_BACKEND_MYSQL_ROOT_DATABASE:-my-secret-pw}@127.0.0.1:7003/${SPIFFWORKFLOW_BACKEND_DATABASE_NAME:-spiffworkflow_backend_development}
     #   - SPIFFWORKFLOW_BACKEND_OPEN_ID_SERVER_URL=http://localhost:7002/realms/spiffworkflow

vars.yml-template

@@ -4,4 +4,8 @@ frontend-image: ghcr.io/gsa-tts/spiffworkflow-frontend:deploy-to-cloud-gov-lates
 db-instance: spiffworkflow-db
 flask-session-key: 66eef9e98a3f4e6f85258154e4a1bdce
 openid-secret: flarblegarble
-randomish-route: flamingo-stardust
+
+# The "slug" is a URL-friendly string that can be used to distinguish between
+# deployments. It will be including in app names and generated URLs. (You can leave
+# this empty for an "official" deployment.)
+slug: -flamingo-stardust