Added apk notes to the knowledge base

knowledge base/apk.md

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+# APK
+
+## TL;DR
+
+```shell
+# Update the package lists.
+apk update
+
+# Search for packages
+apk search duperemove
+apk search -a parallel
+apk --no-cache search -v
+
+# Get information about packages.
+apk info htop
+apk --no-cache info -a curl
+
+# List installed packages.
+apk list -I
+
+# Install packages.
+apk add zstd
+apk --no-cache add -i zfs=2.1.4-r0 xz>=5.2.0
+apk -s add --allow-untrusted path/to/foo.apk
+
+# Upgrade packages.
+apk upgrade
+apk --no-cache add -iu apk-tools
+apk -s add -u --allow-untrusted path/to/foo.apk
+
+# Remove packages.
+apk del php7
+
+# Remove cache.
+apk cache clean
+apk cache -v sync
+
+# Find what package provides a file.
+apk info --who-owns /etc/passwd
+
+# List files included in a package.
+apk info -L zsh
+
+# Check if a package is installed.
+apk info -e fdupes
+
+# List packages dependencies.
+apk info -R atop
+
+# List packages depending on a package.
+apk info -r bash
+
+# Show the installed size of an installed package.
+apk info -s top
+
+# Get an installed package's description.
+apk info -d parallel
+```
+
+## Sources
+
+- [10 Alpine Linux apk Command Examples]
+
+[10 alpine linux apk command examples]: https://www.cyberciti.biz/faq/10-alpine-linux-apk-command-examples/