diff --git a/dockerfiles/env.rc b/dockerfiles/.env
similarity index 84%
rename from dockerfiles/env.rc
rename to dockerfiles/.env
index 0a67936..06b907d 100644
--- a/dockerfiles/env.rc
+++ b/dockerfiles/.env
@@ -3,7 +3,7 @@ DACHS_LOGS_PATH="./tmp/logs"
 
 # Dachs branch/repository version.
 # Options are: stable, backports, beta.
-INSTALL_REPO=latest
+INSTALL_REPO=main
 
 # PostgreSQL version to build containers
-PG_VERSION=13
+PG_VERSION=15
diff --git a/dockerfiles/dachs/Dockerfile.dachs_postgres b/dockerfiles/dachs/Dockerfile.dachs_postgres
index 485f891..3b87d81 100644
--- a/dockerfiles/dachs/Dockerfile.dachs_postgres
+++ b/dockerfiles/dachs/Dockerfile.dachs_postgres
@@ -1,12 +1,8 @@
-FROM "debian:bullseye"
+FROM debian:bookworm
 
 LABEL Description=DaCHS\ is\ a\ publishing\ infrastructure\ for\ the\ Virtual\ Observatory. \
-      Author=Markus\ Demleitner \
-      URL=http://docs.g-vo.org/DaCHS \
       Reference=http://arxiv.org/abs/1408.5733
 
-MAINTAINER "Carlos H Brandt <github:chbrandt>"
-
 # Everyday tools
 RUN DEBIAN_FRONTEND='noninteractive' \
     && apt-get update \
@@ -24,20 +20,13 @@ RUN DEBIAN_FRONTEND='noninteractive' \
 # BUILD argument for extra repositories (besides debian/stable) to install dachs.
 # Options are:
 # - backports (debian/backports)
-# - gavo or latest: (gavo/release + gavo/beta)
+# - gavo/beta (gavo/release + gavo/beta)
 # - main (debian/main)
-# * If not defined, default is 'latest'
-ARG INSTALL_REPO="${INSTALL_REPO:-latest}"
-
-ENV REPO_RELEASE='deb http://vo.ari.uni-heidelberg.de/debian release main'
-ENV REPO_BETA='deb http://vo.ari.uni-heidelberg.de/debian beta main'
-ENV REPO_BACKPORT='deb http://deb.debian.org/debian bullseye-backports main contrib'
-
-ENV APT_SOURCES="/etc/apt/sources.list.d/gavo.list"
-COPY /etc/apt_sources.list "$APT_SOURCES"
+# * If not defined, default is 'main'
+ARG INSTALL_REPO="${INSTALL_REPO:-main}"
 
-ARG PG_VERSION=13
-ENV PG_VERSION=${PG_VERSION}
+ENV _APT_SOURCES="/etc/apt/sources.list.d/gavo.list"
+COPY etc/apt_sources.list "$_APT_SOURCES"
 
 # Some fixes on the environment
 # ---
@@ -47,21 +36,28 @@ ENV PG_VERSION=${PG_VERSION}
 ENV LC_ALL=C.UTF-8
 RUN echo LC_ALL="$LC_ALL" > /etc/default/locale
 
-#RUN sed -i 's/exit 101/exit 0/' /usr/sbin/policy-rc.d
+RUN sed -i 's/exit 101/exit 0/' /usr/sbin/policy-rc.d
 # ---
 
 # Setup GAVO key, then repositories according to INSTALL_REPO
-RUN wget -qO - http://docs.g-vo.org/archive-key.asc | apt-key add -
+# RUN wget -qO - http://docs.g-vo.org/archive-key.asc | apt-key add -
+RUN curl https://vo.ari.uni-heidelberg.de/debian/gavo-archive-keyring.asc \
+    | tee /etc/apt/trusted.gpg.d/gavo-archive.keyring.asc
 
+# If installing any version other than "main", backports is in there:
 RUN [ "$INSTALL_REPO" != "main" ] \
-      && sed -i '/deb.*backports/s/^#//' $APT_SOURCES \
+      && sed -i '/deb.*backports/s/^#//' $_APT_SOURCES \
       || echo "NOT using debian/backports repo"
 
-RUN [ "$INSTALL_REPO" = "gavo" -o "$INSTALL_REPO" = "latest" ] \
-      && sed -i '/deb.*heidelberg/s/^#//' $APT_SOURCES \
+# If installing -- i.e, "beta" version -- uncomment gavo's release and beta repos
+RUN [ "$INSTALL_REPO" = "gavo/beta" -o "$INSTALL_REPO" = "latest" -o "$INSTALL_REPO" = "gavo" ] \
+      && sed -i '/deb.*heidelberg/s/^#//' $_APT_SOURCES \
       || echo "NOT using gavo beta/release repos"
 
-RUN echo "Using the following repositories:" && grep "deb" $APT_SOURCES
+RUN echo "Using the following repositories:" && grep "deb" $_APT_SOURCES
+
+ARG PG_VERSION=15
+ENV PG_VERSION=${PG_VERSION}
 
 RUN DEBIAN_FRONTEND='noninteractive'                                && \
     apt-get update                                                  && \
diff --git a/dockerfiles/docker-compose.full.yml b/dockerfiles/docker-compose.full.yml
index daf80d1..1175b16 100644
--- a/dockerfiles/docker-compose.full.yml
+++ b/dockerfiles/docker-compose.full.yml
@@ -3,45 +3,47 @@ version: '3'
 services:
 
   postgres:
-      container_name: postgres
-      image: dachs:postgres
-      build:
-        context: ./dachs
-        args:
-          PG_VERSION: "${PG_VERSION:-13}"
-      tty: true
-      network_mode: 'bridge'
+    build:
+      context: ./dachs
+      args:
+        PG_VERSION: "${PG_VERSION:-15}"
+    image: dachs:postgres
+    container_name: postgres
+    tty: true
+    network_mode: 'bridge'
+
 
   dachs:
-      container_name: dachs
-      image: dachs:server
-      depends_on:
-        - postgres
-      build:
-        context: ./dachs
-        dockerfile: Dockerfile.dachs_server
-        args:
-          INSTALL_REPO: "${INSTALL_REPO}"
-          PG_VERSION: "${PG_VERSION:-13}"
-      links:
-        - postgres
-      tty: true
-      network_mode: 'bridge'
-      ports:
-        - 8080:8080
-      volumes:
-        - "${DACHS_LOGS_PATH:-./tmp/logs}:/var/gavo/logs"
+    build:
+      context: ./dachs
+      dockerfile: Dockerfile.dachs_server
+      args:
+        INSTALL_REPO: "${INSTALL_REPO}"
+        PG_VERSION: "${PG_VERSION:-15}"
+    image: dachs:server
+    container_name: dachs
+    tty: true
+    network_mode: 'bridge'
+    depends_on:
+      - postgres
+    links:
+      - postgres
+    ports:
+      - 8080:8080
+    volumes:
+      - "${DACHS_LOGS_PATH:-./tmp/logs}:/var/gavo/logs"
+
 
-  awstats:
-      container_name: awstats
-      image: dachs:awstats
-      depends_on:
-        - dachs
-      build:
-        context: ./awstats
-      tty: true
-      network_mode: 'bridge'
-      ports:
-        - 80:80
-      volumes:
-        - "${DACHS_LOGS_PATH:-./tmp/logs}:/var/gavo/logs:ro"
+  # awstats:
+  #   container_name: awstats
+  #   image: dachs:awstats
+  #   depends_on:
+  #     - dachs
+  #   build:
+  #     context: ./awstats
+  #   tty: true
+  #   network_mode: 'bridge'
+  #   ports:
+  #     - 80:80
+  #   volumes:
+  #     - "${DACHS_LOGS_PATH:-./tmp/logs}:/var/gavo/logs:ro"
diff --git a/dockerfiles/docker-compose.yml b/dockerfiles/docker-compose.yml
index e35d3f2..e1b9d33 100644
--- a/dockerfiles/docker-compose.yml
+++ b/dockerfiles/docker-compose.yml
@@ -7,6 +7,8 @@ services:
     build:
       context: ./dachs 
       dockerfile: Dockerfile
+      args:
+        INSTALL_REPO: "${INSTALL_REPO}"
 
     container_name: dachs
     command: ['--rcfile','/start.sh']