Read env vars from .env.pairist file if given

This is intended to make reproducible deployment and development easier.
Now, if there is a file called .env.pairist in the current directory
when these scripts are run, it'll be sourced and env vars will be loaded
from it.

Also added a .env.pairist.sample to make this simpler.

.env.pairist.sample

@@ -0,0 +1,13 @@
+# always required:
+
+PAIRIST_FIREBASE_PROJECT_ID="sample-project-id"
+PAIRIST_FIREBASE_API_KEY="sample-api-key"
+
+# optional (uncomment & set if not using defaults):
+
+# PAIRIST_FIREBASE_AUTH_DOMAIN="sample-project-id.firebaseapp.com"
+# PAIRIST_FIREBASE_URL="https://sample-project-id.firebaseio.com"
+# PAIRIST_ALLOWED_EMAIL_DOMAINS="example.com"
+
+# NOTE:
+# see docs/configuration.md for complete list of env vars

.gitignore

@@ -12,6 +12,7 @@ node_modules
 .firebase
 
 # misc
+.env.pairist
 .DS_Store
 .env.local
 .env.development.local

scripts/build

@@ -2,6 +2,15 @@
 
 set -e
 
+if [ -f ".env.pairist" ]; then
+  echo "Loading env vars from .env.pairist file"
+  set -a
+  source ".env.pairist"
+  set +a
+else
+  echo "No .env.pairist file found"
+fi
+
 if [ -z "$PAIRIST_FIREBASE_PROJECT_ID" ]; then
   echo "PAIRIST_FIREBASE_PROJECT_ID is not set."
   echo "This should be set to your Firebase project ID."

scripts/deploy

@@ -2,6 +2,15 @@
 
 set -e
 
+if [ -f ".env.pairist" ]; then
+  echo "Loading env vars from .env.pairist file"
+  set -a
+  source ".env.pairist"
+  set +a
+else
+  echo "No .env.pairist file found"
+fi
+
 if [ -z "$PAIRIST_FIREBASE_PROJECT_ID" ]; then
   echo "PAIRIST_FIREBASE_PROJECT_ID is not set."
   echo "This should be set to your Firebase project ID."

scripts/start

@@ -2,6 +2,15 @@
 
 set -e
 
+if [ -f ".env.pairist" ]; then
+  echo "Loading env vars from .env.pairist file"
+  set -a
+  source ".env.pairist"
+  set +a
+else
+  echo "No .env.pairist file found"
+fi
+
 if [ -z "$PAIRIST_FIREBASE_PROJECT_ID" ]; then
   echo "PAIRIST_FIREBASE_PROJECT_ID is not set."
   echo "This should be set to your Firebase project ID."