Fix Admin and Invite links never showing on Reader nav

support more image formats

Bump golang.org/x/net from 0.20.0 to 0.22.0

Bump github.com/stretchr/testify from 1.8.4 to 1.9.0

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.20.0 to 0.22.0.
- [Commits](https://github.com/golang/net/compare/v0.20.0...v0.22.0)

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Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.8.4 to 1.9.0.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.8.4...v1.9.0)

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Version number and healthcheck fixes for Docker image

Add "Import posts" to base.tmpl to be consistent with /me/* nav bar

add f.created to join, add Created to Scan

Fixes #873

Fix Collection property serialization on API

Bump github.com/mattn/go-sqlite3 from 1.14.19 to 1.14.21

Bumps [github.com/mattn/go-sqlite3](https://github.com/mattn/go-sqlite3) from 1.14.19 to 1.14.21.
- [Release notes](https://github.com/mattn/go-sqlite3/releases)
- [Commits](https://github.com/mattn/go-sqlite3/compare/v1.14.19...v1.14.21)

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fix: RTL support on post textarea

Fixing right to left (short: RTL) support for respective RTL languages
by adding auto-detection for the user content's directionality based on
the text's language.

Fixes #612

Bump golang.org/x/net from 0.17.0 to 0.20.0

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.17.0 to 0.20.0.
- [Commits](https://github.com/golang/net/compare/v0.17.0...v0.20.0)

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Bump golang.org/x/crypto from 0.14.0 to 0.18.0

Bump github.com/urfave/cli/v2 from 2.25.7 to 2.27.1

Bump github.com/mattn/go-sqlite3 from 1.14.17 to 1.14.19

Bump github.com/gorilla/schema from 1.2.0 to 1.2.1

Bumps [github.com/gorilla/schema](https://github.com/gorilla/schema) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/gorilla/schema/releases)
- [Commits](https://github.com/gorilla/schema/compare/v1.2.0...v1.2.1)

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Bump github.com/gorilla/feeds from 1.1.1 to 1.1.2

Bumps [github.com/gorilla/feeds](https://github.com/gorilla/feeds) from 1.1.1 to 1.1.2.
- [Release notes](https://github.com/gorilla/feeds/releases)
- [Commits](https://github.com/gorilla/feeds/compare/v1.1.1...v1.1.2)

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Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.14.0 to 0.18.0.
- [Commits](https://github.com/golang/crypto/compare/v0.14.0...v0.18.0)

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Bumps [github.com/mattn/go-sqlite3](https://github.com/mattn/go-sqlite3) from 1.14.17 to 1.14.19.
- [Release notes](https://github.com/mattn/go-sqlite3/releases)
- [Commits](https://github.com/mattn/go-sqlite3/compare/v1.14.17...v1.14.19)

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Bump github.com/fatih/color from 1.15.0 to 1.16.0

Bump github.com/gorilla/sessions from 1.2.1 to 1.2.2

Bumps [github.com/gorilla/sessions](https://github.com/gorilla/sessions) from 1.2.1 to 1.2.2.
- [Release notes](https://github.com/gorilla/sessions/releases)
- [Commits](https://github.com/gorilla/sessions/compare/v1.2.1...v1.2.2)

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Bump github.com/gorilla/mux from 1.8.0 to 1.8.1

Bump github.com/gorilla/csrf from 1.7.1 to 1.7.2

Add Contact page links to footers

Bumps [github.com/urfave/cli/v2](https://github.com/urfave/cli) from 2.25.7 to 2.27.1.
- [Release notes](https://github.com/urfave/cli/releases)
- [Changelog](https://github.com/urfave/cli/blob/main/docs/CHANGELOG.md)
- [Commits](https://github.com/urfave/cli/compare/v2.25.7...v2.27.1)

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Dockerfile

Bumps [github.com/fatih/color](https://github.com/fatih/color) from 1.15.0 to 1.16.0.
- [Release notes](https://github.com/fatih/color/releases)
- [Commits](https://github.com/fatih/color/compare/v1.15.0...v1.16.0)

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Bumps [github.com/gorilla/mux](https://github.com/gorilla/mux) from 1.8.0 to 1.8.1.
- [Release notes](https://github.com/gorilla/mux/releases)
- [Commits](https://github.com/gorilla/mux/compare/v1.8.0...v1.8.1)

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Bumps [github.com/gorilla/csrf](https://github.com/gorilla/csrf) from 1.7.1 to 1.7.2.
- [Release notes](https://github.com/gorilla/csrf/releases)
- [Commits](https://github.com/gorilla/csrf/compare/v1.7.1...v1.7.2)

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Look for custom CSS in static_parent_dir

Use standard string instead of sql.NullString for `style_sheet`, `script`, and `signature`.

Addresses #820

Protect drafts if they are part of a Private or Protected collection