test: add apache, caddy, and nginx smoke test environments

Signed-off-by: Xe Iaso <me@xeiaso.net>

test/caddy/Caddyfile

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+:80 {
+	reverse_proxy http://anubis:3000 {
+		header_up X-Real-Ip {remote_host}
+		header_up X-Http-Version {http.request.proto}
+	}
+}
+
+:443 {
+	tls /etc/techaro/pki/caddy.local.cetacean.club/cert.pem /etc/techaro/pki/caddy.local.cetacean.club/key.pem
+
+	reverse_proxy http://anubis:3000 {
+		header_up X-Real-Ip {remote_host}
+		header_up X-Http-Version {http.request.proto}
+		header_up X-Tls-Version {http.request.tls.version}
+	}
+}

test/caddy/Dockerfile

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+# FROM caddy:2.10.0-builder AS builder
+
+# RUN xcaddy build \
+#   --with github.com/lolPants/caddy-requestid
+
+FROM caddy:2.10.0 AS run
+
+# COPY --from=builder /usr/bin/caddy /usr/bin/caddy
+COPY Caddyfile /etc/caddy/Caddyfile

test/caddy/docker-compose.yaml

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+services:
+  caddy:
+    image: xxxtest/caddy
+    build: .
+    ports:
+      - 8080:80
+      - 8443:443
+    volumes:
+      - "../pki/caddy.local.cetacean.club:/etc/techaro/pki/caddy.local.cetacean.club/"
+
+  anubis:
+    image: git.xeserv.us/techaro/anubis:cel
+    environment:
+      BIND: ":3000"
+      TARGET: http://httpdebug:3000
+      POLICY_FNAME: /etc/techaro/anubis/less_paranoid.yaml
+    volumes:
+      - ../anubis_configs:/etc/techaro/anubis
+
+  httpdebug:
+    image: ghcr.io/xe/x/httpdebug
+    pull_policy: always

test/caddy/start.sh

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+#!/usr/bin/env bash
+
+# If the transient local TLS certificate doesn't exist, mint a new one
+if [ ! -f ../pki/caddy.local.cetacean.club/cert.pem ]; then
+  # Subshell to contain the directory change
+  (
+    cd ../pki \
+    && mkdir -p caddy.local.cetacean.club \
+    && \
+    # Try using https://github.com/FiloSottile/mkcert for better DevEx,
+    # but fall back to using https://github.com/jsha/minica in case
+    # you don't have that installed.
+    (
+      mkcert \
+        --cert-file ./caddy.local.cetacean.club/cert.pem \
+        --key-file ./caddy.local.cetacean.club/key.pem caddy.local.cetacean.club \
+      || go tool minica -domains caddy.local.cetacean.club
+    )
+  )
+fi
+
+docker compose up --build