Add creating `/data/db` directory for persistent storage (#5)

- Add creating `/data/db` directory for persistent storage (c6fdfc40c13c8b96878289ecf7b533066964c323)
- Remove old `mongod.lock` file (0fd5f18c9061d2426d3cc0ad0c8f8bedd561a19d)
- Add removing multiple mongo *.lock files (0bf7d949000a04f9bffd90f156e8693d7c6ec0f8)
- Update entrypoint.sh.template (1ed57be4f33963c2d2f1156a4ceea2870cc8da62)


Co-authored-by: Gabriel Martín Blázquez <[email protected]>

entrypoint.sh.template

@@ -1,5 +1,9 @@
 #!/bin/bash
 
+# Make sure `/data/db` directory exists even with persistent storage
+mkdir -p /data/db
+# If app crashed, mongo didn't stop gracefully. Remove all the old *.lock files
+find /data/db -name "*.lock" -type f -exec rm -f {} \; 
 # Start the local Mongo database
 mongod &