Update builder images to Ubuntu 26.04 LTS (#48)

Author: FluxCapacitor2

builders/dockerfile/Dockerfile

@@ -1,18 +1,12 @@
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 
 # https://docs.docker.com/reference/dockerfile/#example-cache-apt-packages
 RUN rm -f /etc/apt/apt.conf.d/docker-clean; echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache
+# hadolint ignore=DL3008 # Pinning apt package versions is fragile since old versions are removed after new versions are published. We're using an Ubuntu LTS base, so the chances of breaking changes are low.
 RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \
     apt-get update && \
-    apt-get install -y --no-install-recommends software-properties-common=0.99.49.4 wget=1.21.4-1ubuntu4.1 libssl3=3.0.13-0ubuntu3.9 ca-certificates=20240203 && \
-    # ^ This package includes `add-apt-repository`
-    add-apt-repository ppa:git-core/ppa && \
-    apt-get update && \
-    # ^ Get the latest version of Git from their PPA (we need 2.49.0 or later because we use the `git clone --revision` flag)
-    apt-get install -y --no-install-recommends git=1:2.53.0-0ppa1~ubuntu24.04.1 && \
-    apt-get remove -y software-properties-common && \
-    apt-get autoremove -y
+    apt-get install -y --no-install-recommends git wget libssl3 ca-certificates jq
 
 RUN groupadd -g 65532 -r appuser && \
     useradd  -u 65532 -m -g appuser appuser

builders/railpack/Dockerfile

@@ -1,20 +1,14 @@
 ARG RAILPACK_VERSION=0.23.0
 
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 
 # https://docs.docker.com/reference/dockerfile/#example-cache-apt-packages
 RUN rm -f /etc/apt/apt.conf.d/docker-clean; echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache
+# hadolint ignore=DL3008 # Pinning apt package versions is fragile since old versions are removed after new versions are published. We're using an Ubuntu LTS base, so the chances of breaking changes are low.
 RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \
     apt-get update && \
-    apt-get install -y --no-install-recommends software-properties-common=0.99.49.4 wget=1.21.4-1ubuntu4.1 libssl3=3.0.13-0ubuntu3.9 ca-certificates=20240203 jq=1.7.1-3ubuntu0.24.04.1 && \
-    # ^ This package includes `add-apt-repository`
-    add-apt-repository ppa:git-core/ppa && \
-    apt-get update && \
-    # ^ Get the latest version of Git from their PPA (we need 2.49.0 or later because we use the `git clone --revision` flag)
-    apt-get install -y --no-install-recommends git=1:2.53.0-0ppa1~ubuntu24.04.1 && \
-    apt-get remove -y software-properties-common && \
-    apt-get autoremove -y
+    apt-get install -y --no-install-recommends git wget libssl3 ca-certificates jq
 
 ARG RAILPACK_VERSION
 RUN \