Migrate Dockerfile from Alpine to Ubuntu

Dockerfile

@@ -23,26 +23,26 @@
 
 # The Alpine Linux image that should be used as the basis for the guacd image
 ARG ALPINE_BASE_IMAGE=latest
-FROM alpine:${ALPINE_BASE_IMAGE} AS builder
+FROM ubuntu AS builder
 
 # Install build dependencies
-RUN apk add --no-cache                \
+RUN apt update && apt install -y      \
         autoconf                      \
         automake                      \
-        build-base                    \
-        cairo-dev                     \
+        gcc g++                       \
+        libcairo2-dev                 \
         cmake                         \
         git                           \
         grep                          \
-        libjpeg-turbo-dev             \
+        libjpeg-turbo8-dev            \
         libpng-dev                    \
         libtool                       \
         libwebp-dev                   \
         make                          \
-        openssl-dev                   \
-        pango-dev                     \
-        pulseaudio-dev                \
-        util-linux-dev
+        libssl-dev                    \
+        libpango1.0-dev               \
+        libpulse-dev                  \
+	libspice-client-glib-2.0-dev
 
 # Copy source to container for sake of build
 ARG BUILD_DIR=/tmp/guacamole-server
@@ -146,7 +146,7 @@ RUN ${BUILD_DIR}/src/guacd-docker/bin/list-dependencies.sh \
         > ${PREFIX_DIR}/DEPENDENCIES
 
 # Use same Alpine version as the base for the runtime image
-FROM alpine:${ALPINE_BASE_IMAGE}
+FROM ubuntu
 
 #
 # Base directory for installed build artifacts. See also the
@@ -166,16 +166,15 @@ ENV GUACD_LOG_LEVEL=info
 COPY --from=builder ${PREFIX_DIR} ${PREFIX_DIR}
 
 # Bring runtime environment up to date and install runtime dependencies
-RUN apk add --no-cache                \
+RUN apt update && apt install -y      \
         ca-certificates               \
         ghostscript                   \
         netcat-openbsd                \
-        shadow                        \
-        terminus-font                 \
-        ttf-dejavu                    \
-        ttf-liberation                \
-        util-linux-login && \
-    xargs apk add --no-cache < ${PREFIX_DIR}/DEPENDENCIES
+        fonts-terminus		      \
+	fonts-dejavu                  \
+        fonts-liberation              \
+	libcairo2		      \
+	libspice-client-glib-2.0-8
 
 # Checks the operating status every 5 minutes with a timeout of 5 seconds
 HEALTHCHECK --interval=5m --timeout=5s CMD nc -z 127.0.0.1 4822 || exit 1