diff --git a/.env b/.env
new file mode 100644
index 0000000..1605118
--- /dev/null
+++ b/.env
@@ -0,0 +1,8 @@
+# Shared configuration for all scripts.
+# Sourced by scripts/*.sh — do not use Docker --env-file with this.
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[1]}")" && pwd)"
+PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
+SITE_DIR="${PROJECT_ROOT}/site"
+HUGO_IMAGE="ghcr.io/gohugoio/hugo:latest"
+PORT="${PORT:-1313}"
diff --git a/scripts/build.sh b/scripts/build.sh
index 393e909..1c9e668 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -4,11 +4,8 @@ set -euo pipefail
 # Build and serve the Hugo site locally using Docker.
 # Usage: ./scripts/build.sh
 
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
-SITE_DIR="${PROJECT_ROOT}/site"
-HUGO_IMAGE="ghcr.io/gohugoio/hugo:latest"
-PORT="${1:-1313}"
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/../.env"
+PORT="${1:-$PORT}"
 
 if [[ ! -d "${SITE_DIR}" ]]; then
   echo "[build] Site directory not found: ${SITE_DIR}"
diff --git a/scripts/serve.sh b/scripts/serve.sh
index 33a4a38..d3a1b91 100755
--- a/scripts/serve.sh
+++ b/scripts/serve.sh
@@ -4,11 +4,8 @@ set -euo pipefail
 # Serve the Hugo site locally using Docker.
 # Usage: ./scripts/serve.sh
 
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
-SITE_DIR="${PROJECT_ROOT}/site"
-HUGO_IMAGE="ghcr.io/gohugoio/hugo:latest"
-PORT="${1:-1313}"
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/../.env"
+PORT="${1:-$PORT}"
 
 if [[ ! -d "${SITE_DIR}" ]]; then
   echo "[serve] Site directory not found: ${SITE_DIR}"
diff --git a/scripts/setup.sh b/scripts/setup.sh
index a13830e..c66535b 100755
--- a/scripts/setup.sh
+++ b/scripts/setup.sh
@@ -4,10 +4,7 @@ set -euo pipefail
 # Initialize a Hugo site with the Terminal theme using Docker.
 # Usage: ./scripts/setup.sh
 
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
-SITE_DIR="${PROJECT_ROOT}/site"
-HUGO_IMAGE="ghcr.io/gohugoio/hugo:latest"
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/../.env"
 
 hugo() {
   docker run --rm \