Remove libcap (#3616)

libcap is no longer needed so we don't need to install it anymore.

This also removes temporary fixes for CVEs.

build/Dockerfile

@@ -13,12 +13,7 @@ FROM opentracing/nginx-opentracing:nginx-1.23.3-alpine as alpine-opentracing-lib
 FROM nginx:1.23.3 AS debian
 
 RUN --mount=type=bind,from=opentracing-lib,target=/tmp/ot/ \
-	apt-get update \
-	&& apt-get install --no-install-recommends --no-install-suggests -y libcap2-bin \
-	# temp fix for CVE-2023-0361, CVE-2023-0795 and CVE-2023-23916
-	&& apt-get install -y libgnutls30 libtiff5 curl \
-	&& rm -rf /var/lib/apt/lists/* \
-	&& cp -av /tmp/ot/usr/local/lib/libopentracing.so* /tmp/ot/usr/local/lib/libjaegertracing*so* /tmp/ot/usr/local/lib/libzipkin*so* /tmp/ot/usr/local/lib/libdd*so* /tmp/ot/usr/local/lib/libyaml*so* /usr/local/lib/ \
+	cp -av /tmp/ot/usr/local/lib/libopentracing.so* /tmp/ot/usr/local/lib/libjaegertracing*so* /tmp/ot/usr/local/lib/libzipkin*so* /tmp/ot/usr/local/lib/libdd*so* /tmp/ot/usr/local/lib/libyaml*so* /usr/local/lib/ \
 	&& cp -av /tmp/ot/usr/lib/nginx/modules/ngx_http_opentracing_module.so /usr/lib/nginx/modules/ \
 	&& ldconfig
 
@@ -27,7 +22,7 @@ RUN --mount=type=bind,from=opentracing-lib,target=/tmp/ot/ \
 FROM nginx:1.23.3-alpine AS alpine
 
 RUN --mount=type=bind,from=alpine-opentracing-lib,target=/tmp/ot/ \
-	apk add --no-cache libcap libstdc++ \
+	apk add --no-cache libstdc++ \
 	# temp fix for CVE-2023-23916
 	&& apk upgrade --no-cache curl libcurl \
 	&& cp -av /tmp/ot/usr/local/lib/libopentracing.so* /tmp/ot/usr/local/lib/libjaegertracing*so* /tmp/ot/usr/local/lib/libzipkin*so* /tmp/ot/usr/local/lib/libdd*so* /tmp/ot/usr/local/lib/libyaml*so* /usr/local/lib/ \
@@ -44,7 +39,7 @@ RUN --mount=type=secret,id=nginx-repo.crt,dst=/etc/apk/cert.pem,mode=0644 \
 	--mount=type=bind,from=alpine-opentracing-lib,target=/tmp/ot/ \
 	wget -nv -O /etc/apk/keys/nginx_signing.rsa.pub https://cs.nginx.com/static/keys/nginx_signing.rsa.pub \
 	&& printf "%s\n" "https://pkgs.nginx.com/plus/${NGINX_PLUS_VERSION}/alpine/v$(grep -E -o '^[0-9]+\.[0-9]+' /etc/alpine-release)/main" >> /etc/apk/repositories \
-	&& apk add --no-cache libcap nginx-plus nginx-plus-module-njs nginx-plus-module-opentracing libcurl \
+	&& apk add --no-cache nginx-plus nginx-plus-module-njs nginx-plus-module-opentracing libcurl \
 	&& cp -av /tmp/ot/usr/local/lib/libjaegertracing*so* /tmp/ot/usr/local/lib/libzipkin*so* /tmp/ot/usr/local/lib/libdd*so* /tmp/ot/usr/local/lib/libyaml*so* /usr/local/lib/ \
 	&& ldconfig /usr/local/lib/
 
@@ -60,16 +55,14 @@ RUN --mount=type=secret,id=nginx-repo.crt,dst=/etc/ssl/nginx/nginx-repo.crt,mode
 	--mount=type=secret,id=nginx-repo.key,dst=/etc/ssl/nginx/nginx-repo.key,mode=0644 \
 	--mount=type=bind,from=opentracing-lib,target=/tmp/ot/ \
 	apt-get update \
-	&& apt-get install --no-install-recommends --no-install-suggests -y ca-certificates gnupg curl apt-transport-https libcap2-bin \
+	&& apt-get install --no-install-recommends --no-install-suggests -y ca-certificates gnupg curl apt-transport-https \
 	&& curl -fsSL https://cs.nginx.com/static/keys/nginx_signing.key | gpg --dearmor > /etc/apt/trusted.gpg.d/nginx_signing.gpg \
 	&& curl -fsSL -o /etc/apt/apt.conf.d/90pkgs-nginx https://cs.nginx.com/static/files/90pkgs-nginx \
 	&& DEBIAN_VERSION=$(awk -F '=' '/^VERSION_CODENAME=/ {print $2}' /etc/os-release) \
 	&& printf "%s\n" "Acquire::https::pkgs.nginx.com::User-Agent \"k8s-ic-$IC_VERSION${BUILD_OS##debian-plus}-apt\";" >> /etc/apt/apt.conf.d/90pkgs-nginx \
 	&& printf "%s\n" "deb https://pkgs.nginx.com/plus/${NGINX_PLUS_VERSION}/debian ${DEBIAN_VERSION} nginx-plus" > /etc/apt/sources.list.d/nginx-plus.list \
 	&& apt-get update \
 	&& apt-get install --no-install-recommends --no-install-suggests -y nginx-plus nginx-plus-module-njs nginx-plus-module-opentracing libcurl4 \
-	# temp fix for CVE-2023-0361
-	&& apt-get install -y libgnutls30 \
 	&& apt-get purge --auto-remove -y apt-transport-https gnupg curl \
 	&& cp -av /tmp/ot/usr/local/lib/libjaegertracing*so* /tmp/ot/usr/local/lib/libzipkin*so* /tmp/ot/usr/local/lib/libdd*so* /tmp/ot/usr/local/lib/libyaml*so* /usr/local/lib/ \
 	&& ldconfig \