diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b3653bf
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+## Microservice Architecture and System Design with Python & Kubernetes
+
+This repository refers to the [freeCodeCamp.org](https://www.freecodecamp.org/) hands-on tutorial about microservices architecture and distributed systems using Python, Kubernetes, RabbitMQ, MongoDB, and MySQL.
+
+Watch the [YouTube video](https://www.youtube.com/watch?v=hmkF77F9TLw) for more information.
diff --git a/src/auth/Dockerfile b/src/auth/Dockerfile
index 34d59df..bc3bd80 100644
--- a/src/auth/Dockerfile
+++ b/src/auth/Dockerfile
@@ -2,7 +2,7 @@ FROM python:3.10-slim-bullseye
 
 RUN apt-get update \
   && apt-get install -y --no-install-recommends --no-install-suggests \
-  build-essential default-libmysqlclient-dev \
+  build-essential default-libmysqlclient-dev pkg-config \
   && pip install --no-cache-dir --upgrade pip
 
 WORKDIR /app
diff --git a/src/auth/server.py b/src/auth/server.py
index d8436f2..4f1ec27 100644
--- a/src/auth/server.py
+++ b/src/auth/server.py
@@ -10,7 +10,7 @@
 server.config["MYSQL_USER"] = os.environ.get("MYSQL_USER")
 server.config["MYSQL_PASSWORD"] = os.environ.get("MYSQL_PASSWORD")
 server.config["MYSQL_DB"] = os.environ.get("MYSQL_DB")
-server.config["MYSQL_PORT"] = os.environ.get("MYSQL_PORT")
+server.config["MYSQL_PORT"] = int(os.environ.get("MYSQL_PORT"))
 
 
 @server.route("/login", methods=["POST"])
@@ -35,7 +35,7 @@ def login():
         else:
             return createJWT(auth.username, os.environ.get("JWT_SECRET"), True)
     else:
-        return "invalide credentials", 401
+        return "invalid credentials", 401
 
 
 @server.route("/validate", methods=["POST"])