Add env (#18)

Reviewed-on: #18
Co-authored-by: kdeng00 <kundeng00@pm.me>
Co-committed-by: kdeng00 <kundeng00@pm.me>

.env.docker.sample

@@ -0,0 +1,2 @@
+ROOT_DIRECTORY=/home/songparser/mydata
+ICARUS_BASE_API_URL=http://localhost:3000

.env.sample

@@ -0,0 +1,2 @@
+ROOT_DIRECTORY=/home/songparser/mydata
+ICARUS_BASE_API_URL=http://localhost:3000

.gitignore

@@ -1 +1,2 @@
 /target
+.env