diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..6249c16
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,4 @@
+BROKER_MQTT_PORT=1883
+BROKER_MQTTS_PORT=8883
+HTTP_PORT=7700
+CONFIG_DIR=./example-config
diff --git a/docker-compose.yml b/docker-compose.yml
index dab6181..ab27fb2 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -6,7 +6,7 @@ services:
     build:
       context: ./tor
       args:
-        - SVC_PORT=1883
+        - SVC_PORT=${BROKER_MQTT_PORT}
         - SVC_HOST=broker
     networks:
       - tor_net
@@ -15,10 +15,10 @@ services:
     image: eclipse-mosquitto
     volumes:
       - broker_data:/mosquitto/data
-      - ./config:/mosquitto/config:ro
+      - ${CONFIG_DIR}:/mosquitto/config:ro
     ports:
-      - "1883:1883"
-      - "8883:8883"
+      - ${BROKER_MQTT_PORT}:${BROKER_MQTT_PORT}
+      - ${BROKER_MQTTS_PORT}:${BROKER_MQTTS_PORT}
     networks:
       - tor_net
       - broker_net
@@ -27,9 +27,9 @@ services:
     build: './subscriber'
     volumes:
       - client_data:/data
-      - ./config:/etc/torch:ro
+      - ${CONFIG_DIR}:/etc/torch:ro
     ports:
-      - "7700:8080"
+      - ${HTTP_PORT}:8080
     networks:
       - broker_net
 
diff --git a/config/ca.crt b/example-config/ca.crt
similarity index 100%
rename from config/ca.crt
rename to example-config/ca.crt
diff --git a/config/mosquitto.conf b/example-config/mosquitto.conf
similarity index 100%
rename from config/mosquitto.conf
rename to example-config/mosquitto.conf
diff --git a/config/mqtt.example.com.crt b/example-config/mqtt.example.com.crt
similarity index 100%
rename from config/mqtt.example.com.crt
rename to example-config/mqtt.example.com.crt
diff --git a/config/mqtt.example.com.key b/example-config/mqtt.example.com.key
similarity index 100%
rename from config/mqtt.example.com.key
rename to example-config/mqtt.example.com.key
diff --git a/config/subscriber.crt b/example-config/subscriber.crt
similarity index 100%
rename from config/subscriber.crt
rename to example-config/subscriber.crt
diff --git a/config/subscriber.key b/example-config/subscriber.key
similarity index 100%
rename from config/subscriber.key
rename to example-config/subscriber.key
diff --git a/config/torch-sub.conf b/example-config/torch-sub.conf
similarity index 100%
rename from config/torch-sub.conf
rename to example-config/torch-sub.conf