Update .env_template

.env_template

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+##### API Server settings #####
+# Hostname for the API server to bind to
+API_HOST=localhost
+
+# Port for the API server to bind to
+API_PORT=3000
+
+# Settings for the BigchainDB node that the API server should connect to
+BDB_NODE_HOST=localhost
+BDB_NODE_PORT=9984
+
+# BigchainDB's MongoDB instance
+MONGODB_HOST=127.0.0.1
+MONGODB_PORT=27017
+MONGODB_REPLICASET=bigchain-rs
+
+# A flag stating whether or not the application should allow browsers to access
+# from a remote domain
+CORS_PROTECTION=True
+
+# run `omi-api keypair` to generate the values
+OMI_PUBLIC_KEY=
+OMI_PRIVATE_KEY=