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--- technical:docker-intro [2026/09/11 19:21] – system
+++ technical:docker-intro [2026/09/13 20:12] (current) – [3 types you'll see:] system
@@ Line 108: / Line 108: @@
   - **Bind mount** ./mycode:/app - you link your local folder to container. Great for development, edit code locally, container sees it instantly.
   - **Anonymous volume** - Docker creates random name, don't use it.
+<WRAP center round tip 100%>
+  * The left side is on the host side
+  * The right side is on the container side.
+</WRAP>
 ===== Short Recap =====
@@ Line 183: / Line 189: @@
   * **Dockerfile** = instructions for how to build one brick type — what clay, how hot, how long in oven.
   * **docker-compose.yml** = architectural plan — where bricks go, where plumbing and electrical go, how 3 houses connect into a neighborhood.
+==== When to use what: ====
+  * You write a Dockerfile once per app/service you create.
+  * You write a docker-compose.yml once per project to run all your services together locally.
+You can use Dockerfile without compose:
+  * docker build + docker run
+You cannot use compose without images — either you build them via Dockerfile, or pull them from Hub.
+  * In short:
+      * **Dockerfile** -> //docker build// -> Image
+      * **docker-compose.yml** -> //docker compose up// -> Running containers (built from Dockerfiles or Hub images)
+===== Networking with Docker =====
+  * Because networking is usually hands-on, we will cover the Docker networking in the pages which will do hands on exercises.
+<WRAP center round tip 100%>
+  * Network can be specified when you issue the //docker run// command
+  * Alternatively it can be specified in the docker-compose.yml file and then you issue the //docker compose up// command.
+</WRAP>