diff --git a/.dockerignore b/.dockerignore
index 79289b3acd..389407f6ea 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,5 +1,13 @@
-/docs
-/handbook
-/tools
-/docker-db-data
-/.idea
\ No newline at end of file
+# Project administration files
+.idea
+.git
+.github
+
+# Not used by the build.
+docs
+handbook
+sql
+tools
+
+# Created by the db when using docker-compose, large and causes rebuild issues if sent to the context.
+docker-db-data
diff --git a/Dockerfile b/Dockerfile
index b24fea224d..21eaab8819 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,20 +1,40 @@
 # Initial Docker support thanks to xinyifly
+# Optimisation performed by wejrox
 
 #
-# Build stage
+# Cosmic JAR creation stage
 #
-FROM maven:3.6.3-jdk-8 AS build
-COPY src /home/app/src
-COPY pom.xml /home/app
-RUN mvn -f /home/app/pom.xml clean package
+FROM maven:3.6.3-jdk-8 AS jar
+
+# Build in a separated location which won't have permissions issues.
+WORKDIR /opt/cosmic
+# Any changes to the pom will affect the entire build, so it should be copied first.
+COPY pom.xml ./pom.xml
+# Grab all the dependencies listed in the pom early, since it prevents changes to source code from requiring a complete re-download.
+RUN mvn -f ./pom.xml clean dependency:go-offline
+# Source code changes may not change dependencies, so it can go last.
+COPY src ./src
+RUN mvn -f ./pom.xml clean package
 
 #
-# Package stage
+# Server creation stage
 #
 FROM openjdk:8
-COPY --from=build /home/app/target/Cosmic.jar /usr/local/lib/Cosmic.jar
-COPY ./ ./
+
+# Host the server in a location that won't have permissions issues.
+WORKDIR /opt/server
+# Copy the wizet files first since they're so big and won't change often.
+COPY wz ./wz
+# Copy the JAR we build earlier.
+COPY --from=jar /opt/cosmic/target/Cosmic.jar ./Server.jar
+# Scripts are sourced on server startup, so you can mount over them for quicker redeploy.
+COPY scripts ./scripts/
+# Config is read on server startup, so you can mount over it for quicker redeploy.
+COPY config.yaml ./
+# Default exposure, although not required if using docker compose.
+# This exposes the login server, and channels.
+# Format for channels: WWCC, where WW is 75 plus the world number and CC is 75 plus the channel number (both zero indexed).
 EXPOSE 8484 7575 7576 7577
-ENTRYPOINT ["java", "-jar", "/usr/local/lib/Cosmic.jar"]
+ENTRYPOINT ["java", "-jar", "./Server.jar"]
 
 
diff --git a/docker-compose.yml b/docker-compose.yml
index fc7334dedd..449b5039da 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,8 +5,18 @@ services:
     depends_on:
       - db
     ports:
+      # Login server
       - "8484:8484"
+      # Channels.
+      # Format: WWCC, where WW is 75 plus the world number and CC is 75 plus the channel number (both zero indexed).
+      # In this case, world 1 channels 1-3.
       - "7575-7577:7575-7577"
+    volumes:
+      # Config changes can be reloaded without rebuilding the image.
+      # Still requires a redeployment as they're sourced on startup.
+      - ./config.yaml:/opt/server/config.yaml
+      - ./scripts:/opt/server/scripts
+      - ./wz:/opt/server/wz
     environment:
       DB_HOST: "db"