ci: add cacert to docker image

.gitlab-ci.yml

@@ -9,7 +9,7 @@ variables:
 default:
   # built via:
   #     docker load < $(nix-build nix/docker-image.nix)
-  image: registry.k0.hswaw.net/q3k/flow3r-build:n7b7mjzzpf20jfdbmv1j1cl55n8x01xx
+  image: registry.k0.hswaw.net/q3k/flow3r-build:ymrsh8w1z9l89qvvksw52k7sl54lx73q
 
 clang-tidy:
   stage: check

nix/docker-image.nix

@@ -32,6 +32,7 @@ pkgs.dockerTools.buildImage {
       git wget gnumake
       cmake ninja pkgconfig
       gnutar curl bzip2
+      cacert
     ];
     pathsToLink = [ "/bin" ];
   };
@@ -48,6 +49,7 @@ pkgs.dockerTools.buildImage {
       "IDF_PATH=${pkgs.esp-idf}"
       "IDF_COMPONENT_MANAGER=0"
       "TMPDIR=/tmp"
+      "NIX_SSL_CERT_FILE=${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt"
     ];
   };
 }