[core] remove unneeded vars from shellcheck (#3899)

* remove unneeded wars

* Update alpine-wireguard-install.sh

---------

Co-authored-by: Tobias <96661824+CrazyWolf13@users.noreply.github.com>

install/karakeep-install.sh

@@ -34,7 +34,7 @@ chmod +x /usr/bin/yt-dlp
 msg_ok "Installed Additional Tools"
 
 msg_info "Installing Meilisearch"
-cd /tmp || exit
+cd /tmp
 curl -fsSL "https://github.com/meilisearch/meilisearch/releases/latest/download/meilisearch.deb" -o "meilisearch.deb"
 $STD dpkg -i meilisearch.deb
 curl -fsSL "https://raw.githubusercontent.com/meilisearch/meilisearch/latest/config.toml" -o "/etc/meilisearch.toml"
@@ -59,21 +59,21 @@ $STD npm install -g corepack@0.31.0
 msg_ok "Installed Node.js"
 
 msg_info "Installing karakeep"
-cd /opt || exit
+cd /opt
 RELEASE=$(curl -fsSL https://api.github.com/repos/karakeep-app/karakeep/releases/latest | grep "tag_name" | awk '{print substr($2, 3, length($2)-4) }')
 curl -fsSL "https://github.com/karakeep-app/karakeep/archive/refs/tags/v${RELEASE}.zip" -o "v${RELEASE}.zip"
 unzip -q "v${RELEASE}.zip"
 mv karakeep-"${RELEASE}" /opt/karakeep
-cd /opt/karakeep || exit
+cd /opt/karakeep
 corepack enable
 export PUPPETEER_SKIP_DOWNLOAD="true"
 export NEXT_TELEMETRY_DISABLED=1
 export CI="true"
-cd /opt/karakeep/apps/web || exit
+cd /opt/karakeep/apps/web
 $STD pnpm install --frozen-lockfile
 $STD pnpm exec next build --experimental-build-mode compile
 cp -r /opt/karakeep/apps/web/.next/standalone/apps/web/server.js /opt/karakeep/apps/web
-cd /opt/karakeep/apps/workers || exit
+cd /opt/karakeep/apps/workers
 $STD pnpm install --frozen-lockfile
 
 export DATA_DIR=/opt/karakeep_data
@@ -103,7 +103,7 @@ msg_ok "Installed karakeep"
 
 msg_info "Running Database Migration"
 mkdir -p ${DATA_DIR}
-cd /opt/karakeep/packages/db || exit
+cd /opt/karakeep/packages/db
 $STD pnpm migrate
 msg_ok "Database Migration Completed"