Improve readme instructions issue#35

.env_sample

@@ -0,0 +1,19 @@
+# APP_HOST is the host of your app, if you deploy the app change to your domain.
+export APP_HOST=localhost
+
+# GITHUB_APP_ID is found in settings of your GitHub app under General > About
+export GITHUB_APP_ID=YOUR_GITHUB_APP_ID
+
+# GITHUB_APP_NAME what you called your app.
+export GITHUB_APP_NAME=NAME_OF_THE_GITHUB_APP
+
+# SECRET_KEY_BASE is required for Auth Cookie:
+export SECRET_KEY_BASE=run:mix_phx.gen.secret-in-terminal-and-paste-result-here
+
+# AWS:
+export AWS_ACCESS_KEY_ID=aws-access-key-id
+export AWS_SECRET_ACCESS_KEY=super-secret-key
+export S3_BUCKET_NAME=your-bucket-name
+
+# PRIVATE_KEY should be generated in your GitHub App settings
+# please see instructions in README for how to add it to .env file

.gitignore

@@ -27,3 +27,4 @@ npm-debug.log
 /config/*.secret.exs
 .env
 cover
+*.pem