Add .gitignore and .ratignore files for various directories

Dockerfile

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+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+#
+# Dockerfile for guacamole-client
+#
+
+# Use args for Tomcat image label to allow image builder to choose alternatives
+# such as `--build-arg TOMCAT_JRE=jre8-alpine`
+#
+ARG TOMCAT_VERSION=9
+ARG TOMCAT_JRE=jdk21
+
+# Use official maven image for the build
+FROM maven:3-eclipse-temurin-21 AS builder
+
+# Use Mozilla's Firefox PPA (newer Ubuntu lacks a "firefox-esr" package and
+# provides only a transitional "firefox" package that actually requires Snap
+# and thus can't be used within Docker)
+RUN    apt-get update                                \
+    && apt-get upgrade -y                            \
+    && apt-get install -y software-properties-common \
+    && add-apt-repository -y ppa:mozillateam/ppa
+
+# Explicitly prefer packages from the Firefox PPA
+COPY guacamole-docker/mozilla-firefox.pref /etc/apt/preferences.d/
+
+# Install firefox browser for sake of JavaScript unit tests
+RUN apt-get update && apt-get install -y firefox
+
+# Arbitrary arguments that can be passed to the maven build. By default, an
+# argument will be provided to explicitly unskip any skipped tests. To, for
+# example, allow the building of the RADIUS auth extension, pass a build profile
+# as well: `--build-arg MAVEN_ARGUMENTS="-P lgpl-extensions -DskipTests=false"`.
+ARG MAVEN_ARGUMENTS="-DskipTests=false"
+
+# Versions of JDBC drivers to bundle within image
+ARG MSSQL_JDBC_VERSION=9.4.1
+ARG MYSQL_JDBC_VERSION=8.3.0
+ARG PGSQL_JDBC_VERSION=42.7.2
+
+# Build environment variables
+ENV \
+    BUILD_DIR=/tmp/guacamole-docker-BUILD
+
+# Add configuration scripts
+COPY guacamole-docker/bin/ /opt/guacamole/bin/
+COPY guacamole-docker/build.d/ /opt/guacamole/build.d/
+COPY guacamole-docker/entrypoint.d/ /opt/guacamole/entrypoint.d/
+COPY guacamole-docker/environment/ /opt/guacamole/environment/
+
+# Copy source to container for sake of build
+COPY . "$BUILD_DIR"
+
+# Run the build itself
+RUN /opt/guacamole/bin/build-guacamole.sh "$BUILD_DIR" /opt/guacamole
+
+RUN rm -rf /opt/guacamole/build.d /opt/guacamole/bin/build-guacamole.sh
+
+# For the runtime image, we start with the official Tomcat distribution
+FROM tomcat:${TOMCAT_VERSION}-${TOMCAT_JRE}
+
+# Install XMLStarlet for server.xml alterations
+RUN apt-get update -qq \
+    && apt-get install -y xmlstarlet \
+    && rm -rf /var/lib/apt/lists/* 
+
+# This is where the build artifacts go in the runtime image
+WORKDIR /opt/guacamole
+
+# Copy artifacts from builder image into this image
+COPY --from=builder /opt/guacamole/ .
+
+# Create a new user guacamole
+ARG UID=1001
+ARG GID=1001
+RUN groupadd --gid $GID guacamole
+RUN useradd --system --create-home --shell /usr/sbin/nologin --uid $UID --gid $GID guacamole
+
+# Run with user guacamole
+USER guacamole
+
+# Environment variable defaults
+ENV BAN_ENABLED=true \
+    ENABLE_FILE_ENVIRONMENT_PROPERTIES=true \
+    GUACAMOLE_HOME=/etc/guacamole
+
+# Start Guacamole under Tomcat, listening on 0.0.0.0:8080
+EXPOSE 8080
+CMD ["/opt/guacamole/bin/entrypoint.sh" ]