Exposed docs endpoint, added default env

.env.example

@@ -0,0 +1,10 @@
+DOCKERDIR=/opt/compose/keywarden
+
+KEYWARDEN_SECRET_KEY=
+# PostgreSQL Connection (These are default values, unneeded if matching environment)
+KEYWARDEN_POSTGRES_USER="postgres"
+KEYWARDEN_POSTGRES_PASSWORD="postgres"
+KEYWARDEN_POSTGRES_HOST="keywarden-db"
+KEYWARDEN_POSTGRES_PORT=5432
+KEYWARDEN_POSTGRES_DB="keywarden"
+KEYWARDEN_ACCESS_TOKEN_EXPIRE_MINUTES=60