Test Server Dockerfile (#1775)

## Docker
A Dockerfile has been added for a test server image. This can be spun up
using the compose.yml file with `docker-compose up`

## Aliases in plugin.yml
Some aliases in the plugin.yml were modified to not use special
characters, as this can result in the plugin being unusable on some
servers due to the plugin.yml being unable to be parsed.

Dockerfile

@@ -0,0 +1,33 @@
+FROM ubuntu
+
+# Install dependencies
+RUN apt-get update
+RUN apt-get install -y git \
+    openjdk-17-jdk \
+    openjdk-17-jre \
+    wget \
+    locales
+
+# Create server directory
+WORKDIR /testmcserver
+
+# Build server
+RUN wget -O BuildTools.jar https://hub.spigotmc.org/jenkins/job/BuildTools/lastSuccessfulBuild/artifact/target/BuildTools.jar
+RUN git config --global --unset core.autocrlf || :
+RUN java -jar BuildTools.jar --rev 1.20.4
+RUN echo "eula=true" > eula.txt
+RUN mkdir plugins
+
+# set locale to support us, de, fr, & br
+RUN locale-gen en_US.UTF-8 de_DE.UTF-8 fr_FR.UTF-8 pt_BR.UTF-8 && \
+    update-locale LANG=en_US.UTF-8 LANGUAGE=en_US.UTF-8 LC_ALL=en_US.UTF-8 && \
+    dpkg-reconfigure --frontend=noninteractive locales
+
+# Build plugin
+COPY . .
+RUN ./gradlew build
+RUN cp build/libs/*-all.jar plugins
+
+# Run server
+EXPOSE 25565
+ENTRYPOINT java -jar spigot-1.20.4.jar

compose.yml

@@ -0,0 +1,7 @@
+services:
+  testmcserver:
+    build: .
+    image: mf-test-mc-server
+    container_name: mf-test-mc-server
+    ports:
+      - "25565:25565"

src/main/resources/plugin.yml

@@ -75,11 +75,11 @@ commands:
     usage: /<command> [help|ally|breakalliance|declarewar|makepeace|create|invite|join|law|role|list|claim|unclaim|checkclaim|unclaimall|power|who|invoke|leave|vassalize|swearfealty|declareindependence|grantindependence|kick|map|sethome|home|flag|bypass|chat|set|bonuspower|relationship]
   lock:
     description: Enables or disables lock mode. To cancel lock mode, use /lock cancel.
-    aliases: [verschließen, verschliessen, verrouiller]
+    aliases: [verschlieBen, verschliessen, verrouiller]
     usage: /<command> (cancel)
   unlock:
     description: Enables or disables unlock mode. To cancel unlock mode, use /unlock cancel.
-    aliases: [aufschließen, aufschliessen, déverrouiller, deverrouiller]
+    aliases: [aufschlieBen, aufschliessen, deverrouiller, deverrouiller]
     usage: /<command> (cancel)
   accessors:
     description: |