chore(deps): update alpine docker tag to v3.23 (#42)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

src/backend/atheme/Containerfile

@@ -1,7 +1,7 @@
 # ============================================================================
 # BUILD STAGE - Compile Atheme from source
 # ============================================================================
-FROM alpine:3.22 AS builder
+FROM alpine:3.23@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375 AS builder
 
 # Build arguments
 ARG ATHEME_VERSION="master"
@@ -45,7 +45,7 @@ RUN sed -i "s/@MKDIR_P@/mkdir -p/g" /usr/src/atheme-src/modules/contrib/buildsys
 # ============================================================================
 # RUNTIME STAGE - Minimal production container
 # ============================================================================
-FROM alpine:3.22
+FROM alpine:3.23@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375
 
 # Runtime arguments
 ARG UID=1000

src/backend/unrealircd/Containerfile

@@ -2,7 +2,7 @@
 # BUILD STAGE - Compile UnrealIRCd from source
 # ============================================================================
 # This stage compiles UnrealIRCd and preserves the source code for module management
-FROM alpine:3.22 AS builder
+FROM alpine:3.23@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375 AS builder
 
 # Build arguments
 ARG UNREALIRCD_VERSION=6.2.0.1
@@ -67,7 +67,7 @@ RUN make install
 # ============================================================================
 # This stage includes the compiled UnrealIRCd plus source code and build tools
 # to enable third-party module installation and management
-FROM alpine:3.22
+FROM alpine:3.23@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375
 
 # Runtime arguments (inherit from builder stage)
 ARG UNREALIRCD_VERSION=6.2.0.1