Update Dockerfile

comixed/Dockerfile

@@ -18,20 +18,19 @@ ARG BUILD_FROM
 ARG BUILD_VERSION
 FROM ${BUILD_FROM} AS builder
 FROM openjdk:17-jdk-slim
-RUN apt-get update
-RUN apt-get install -y --no-install-recommends \
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
        openjdk-11-jre \
        unzip \
        wget \
        bash \
        locales \
-       locales-all
-RUN rm -rf /var/lib/apt/lists/*
-RUN locale-gen "en_US.UTF-8"
-ENV LC_ALL en_US.UTF-8
-ENV LANG en_US.UTF-8
-ENV LANGUAGE en_US.UTF-8
-MAINTAINER The ComiXed Project "comixed-dev@freelists.org"
+       locales-all && \
+    rm -rf /var/lib/apt/lists/* && \
+    locale-gen "en_US.UTF-8"
+ENV LC_ALL en_US.UTF-8 \
+    LANG en_US.UTF-8 \
+    LANGUAGE en_US.UTF-8
 
 COPY --from=builder /app /app