upgrade base image

Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:20.04 as builder
+FROM ubuntu:22.04 as builder
 LABEL maintainer michel.promonet@free.fr
 WORKDIR /v4l2rtspserver
 COPY . /v4l2rtspserver
@@ -7,7 +7,7 @@ RUN apt-get update \
     && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends ca-certificates g++ autoconf automake libtool xz-utils cmake make pkg-config git wget libasound2-dev libssl-dev \
     && cmake . && make install && apt-get clean && rm -rf /var/lib/apt/lists/
 
-FROM ubuntu:20.04
+FROM ubuntu:22.04
 WORKDIR /usr/local/share/v4l2rtspserver
 COPY --from=builder /usr/local/bin/ /usr/local/bin/
 COPY --from=builder /usr/local/share/v4l2rtspserver/ /usr/local/share/v4l2rtspserver/

Dockerfile.arm64

@@ -1,4 +1,4 @@
-FROM ubuntu:20.04 as builder
+FROM ubuntu:22.04 as builder
 LABEL maintainer michel.promonet@free.fr
 WORKDIR /v4l2rtspserver
 COPY . /v4l2rtspserver
@@ -12,7 +12,7 @@ RUN apt-get update \
 	&& apt-get clean && rm -rf /var/lib/apt/lists/
 
 
-FROM arm64v8/ubuntu:20.04
+FROM arm64v8/ubuntu:22.04
 
 WORKDIR /usr/local/share/v4l2rtspserver
 COPY --from=builder /usr/local/bin/ /usr/local/bin/